This large thrush is a rare visitor from Siberia. Two subspecies have occurred in North America, Dusky and Naumann’s. Dusky male: Upperparts are blackish with pale feather edges. Wings are mostly rufous. A bold white supercillium separates the dark crown and auriculars. The throat and the area below the eye are whitish, with variable fine dark streaks. The breast and sides are blackish with a bold white scaly pattern, and an indistinct white crescent on the upper breast. Dusky female: Similar to male, but with brownish upperparts, dull brown wings, and less extensive white on the face. Naumann’s subspecies: Pale rufous on the face where Dusky is white. Underparts are rufous with white scaling. Wings are brown on both sexes.